1136 GRAND AVE A&B 2016-01-01 MF Import

� Apri123, 2007 Mr. Scott Anderson L&A Job No. 6A I 26 Page 8 Pill embankments placed over areac stecper than I S% grade should be structurally supported. 7�he ground ovcr which structural fill is to be placed should be prepared in accordance with recommendations in the Site Prcnaration and General Gradin� and Excavation Slopes sections of this report. Structural fill should be placcd in lifts no morc than ]0 inchcs thick in its loose state, with each lifl compacted to a minimum percentage of the maximum dry density determined by ASTM D1557 (Modified Proctor Method)as follows: Aoplication %of Maximwn Drv Density Within building pads of the building lots 95% Roadway/driveway subgrade 95% for top 3 fect and 90% below Rctaining wall backfill 90% Utility trench backfill 95% for top 4 feet and 90% below Building Foundations Com•entional footing foundations may bc uscd to support the proposed duplex building. The footing foundations should be constructed on or into undisturbed, very-dense, fresh till soils or on structural fill constructcd on these competent native basal soils. Water should not be allowed to accumulate in excavaled footing trenches. Disturbed soils in footing trenches should be completely removed do�ti�n to firm native soils prior to pouring concrete for the footings. If the abovc recommcndations ure tiillowed, our rccommendcd design criteria for footing foundations arc as follows: • Allo�vablc soil bcaring pressurc, including dcad and livc loads, should not be morc than 3,000 psf for footings poured on or into very-dense fresh till soils, and not more than LIU & ASSOC[ATES, INC.